System of electrical signaling.



E. G. MISSBACH. SYSTEM OF ELECTRICAL SIGNALING.

APPLICATION PI LED JULY 18,1912.

Patenis'ed F9102, 1915.

L1Q6,82o

nnnsr canons MISSEBAGH, on NEW YORK, n.

ASSIGNOR.TO SIEMENS & HALSKE,

AKTIENGESELLSCHAFT, OF BERLIN, GERMANY, A CORPORATION OF GERMANY.

,sxsrnmior nLnorRIoAhsIqNALING.

To all whom it may concern siding in the borough of Manhattan, city, county, and State ot' New York, have in- Yonted pertain new and useful Improve-- merits in Systems of Electricalsignaling, of which the following is a full and clear specification.

This invention relates to an electric signaling system and more particularly to a system of this kind, by which the angular position of a sending element will be enabled to be transmitted upon a receiving eleniont or a plurality of receiving elements.

For my present system of electric signaling l propose to use between the sending and he receiving station a system of electric power transmission which consists essentially or" a synchronous generator at the sending station and a similar synchronous motor at the receiving station, whereby equality of the angular positions between motor and generator,that is to say synchronisin, will he maintained by the electrical connections between these two elements and whereby furthera rotation-of any of these elements by mere action of electric currents from the current source wil'lbe prevented. I therefore employ an excitationot' such character for this generator'or sending elefl'ltlflt and for this motor or receiving element, that the aotion of the excitation cur rent alone will be unable to move any element from its position of rest, but maintain synchronism in every instance, at rest and during motion, between the sending and the receiving elements.

For the excitation of this enerator and this motor which represent thesending and receiving elements "of mypresent system respectively, I supply single phase alternating current to one memberofs'aid generator and said motr, and employ-a plurality of phase-displaced circuits for the other memher of said generator and said motor, said phase-displaced circuits of said generatorelement being closed u'ponth'e corresponding phase-displaced "circuits of said motor element. In this manner I' seoure' the characteristics of the single phase synchronous or induction motor of not being able to start from rest and thus avoid constant rotation of the motor element or of the generator 1 ment of my present; t

I, l Specification of {letters latenc.

ceiving armature, however,

'nals, the. ifield Patented Feb. e, 1915,.

fi nc soil ar a Iii 13 18, 191a serial No. 710,185,

My invention further comprises improvements of the above system of electric signaling.

One improvement which forms part of my invention consists therein, that l provide means for preventing a receiving element, when in a wrong position, from reacting as generator or sending element upon the other motor or receiving element. A wrong position of a receiving element may, for instance, be caused by a surplus of friction, and for avoiding in this case a reaction, l employ armature windings of a relatively high ohmic or inductive resistance. in addition to this, i reduce the possible interfering action by reducing the size of the receiving elements relatively to the size of the sending element, or in other words, 1' employ a relatively large sending element and relatively small receiving elements. Another result of the smallness of the receiving elements is, that the tendency of the latter to oscillate will be suppressed on account of the smaller momentum of inertia.

By providing high resistance in the rethe moving force 01" this armature will apparently be rendered smaller, and in order to prevent the receiving armature from eventually remaining rest upon motion of the sending element,

provide additional means whereby at instances of s1gnal1ng,that is to say, at an instant when the position of the sending element is changed,-the moving force of the receiving armature will be increased. For this purpose I prefer to use a choke-coil which is normally inserted into the field circuit of the system and which is shorte1rcu1ted at t1mes of motion of the sending armature. W hen the signaling system is inoperative, all armatures will thus be subjeet to a smaller field strength, and consume hnly an amount of current which is sutticient to maintain the proper angular position of thereceiv'ing elements relatively to the sending elements, while at times of giving sigstrength of the system and thereby the moving force of the receiving elements will be increased, to secure positive motion of the latte A further ObJGCt of my invention is to. employ an indicating means which comes automatically into operation at times of signaling for indicating to the attendant the fact that a signal has been given.

M invention will be more fully understoo by reference to the accompanying drawing which shows in a diagrammatic view the arrangement of a signaling system according to the present invention.

Referring more particularly to the drawing, 10 represents the bi-polar field structure of the sending element and 11 the armature of the sending element.

12 are the field coils which are mounted upon pole bodies of the field structure of the sending element, said field-coils being connected by conductor 13 with the mains -14 of a single phase alternating current v of a field 18 and an armature 19, similar to the sending element. The corresponding devices of the two other receiving elements are designated by the same numbers as those of the first receiving element with the addition of the indexes a and b respectively.

The armatures 19, 19 and 19 of the receiving elements contain windings which are of a resistance which is several times that of the sending armature for the above reason. The means for increasing the field strength of the system at times of signaling consist of a contact device comprising a toothed wheel 20 which is mounted upon the shaft of the armature 11 of the sending element, said toothed wheel 20 coiiperating with a roller 21 mounted at the upper end of a lever 22 which is pivoted at 23. This lever 22 and the roller 21 are pressed against the depressions of the toothed disk 20 by means of a spring 24, and secure, therefore, a locking tendency of the sending element in aplurality of angular positions. A further spring 25 is fixed at its lower end to a post 26 and carries-at its upper end a contact member of platinum. Opposite to this contact member 27 there is mounted a further contact member 28, also preferably made of platinum, forming the upper end of the spring 29 which is fixed to a post30. Fromthe posts 30 and 26, conductors 31 lead to the terminals of a choke-coil 32, which is in-. serted into one of the mains of the alternating current source 15 in a manner that said choke-coil will be included in circuit with said alternating current source 15 and parting from sending element in a desired plura 27 which is preferably made masses..-

each of the field windings of the sending element and of the receiving elements. in parallel to the field windings 18, 18 and 18 of the receivin elements, lamps 33, 33 and 33 are inserted, as clearly indicated in the drawing.

If it is esired to transmit signals from the sending element upon each of the receiving elements the armature 11 is rotated by the operator. At every instant when this armature passes a predetermined an ular osition, in the case as shown in the rawing, positions which are spaced from each other by one eighth of the circumference, a contact will be made by means of the contact apparatus above described,said contact short-circuiting the choke-coil 32 momentarily with the passage of the sending armature throu h each of said angular positions. There ore whenever the position a of the sending armature is changed for giving a signal, the field strength of each of the sending and receiving elements will momentarily be increased and secure positive motion of the receiving elements and at the same time the lamps 33, 33 and 33 will momentarily light up and thereby indicate that a signal has been given.

Having thus described my new invention, I do not wish to be understood as confining myself to the precise constructions as shown and described herein since modifications may be made thereon without dethe principles or sacrificing, anyvofthe advantages of this invention.

hat I claim is:

1. In an electric signaling system of the character described, the combination of a relatively large .sending element, with a plurality of relatively small electricallylretained and operated receiving elements a circuit connecting the sending element with the receiving elements, the relative size of said elementsbeing such as to prevent a receiving elementwhen in a .wrong position from reacting upon the other receiving elements, means ,for normally retaining said lity of angular positions, and automatic means for temporarily increasing the operating mm rent for said elements at the instant when said sending element is moved from one into another position.

2. In an electric signaling system of the 'character described, the combination of a sending element ofrelatively large'size and having an armature of relatively low resistance, with a plurality of receiving elements of relatively small size and each having an armature of relatively high resistance, a .circuitconnecting said transmitter and receivers, the sizeand resistance of said receiving elements relatively to the size and resistance of said sending element being such as to prevent-a receiving element when in a 13 other receiving elements, means for normally retaining said sending element in a desired plurality of angular positions, and automatic means for temporarily increasing the operatingcurrent for said elements at the instant when said sending element is moved from one into another position.

. 3. In an electric signaling system of the character described, the combination of a relatively large sending element, a plurality of relatively small electrically retained and operated receiving elements a circuit connecting the sending element with the receiving elements, the relative size of said elements being such as to prevent a receiving element when in a wrong position from reacting upon the others, means for normally retaining said sending element in a desired plurality of angular positions, automatic means for temporarily increasing the field strength of said elements at the in stant when said sending element is moved from one into another position, and a device for indicating said instances of signaling by said increase of operating current.

4a'In an electric signaling system of the character described, the combination of a sending element having an armature of relatively low resistance, with a plurality of receiving elements each having an armature of relatively high resistance, a circuit connecting said transmitter and receivers the resistances of said receiving elements relative to the resistances of said sending element being such as to prevent a receiving element when in a wrong position from reacting upon the others, means for normally retaining said sending element in a desired plurality of angular positions, and automatic means for temporarily increasing the operating current for said elements at the instant when said sending element is moved from one into another position.

5. In an electric signaling system of the character described, the combination of a sending element of relatively large size and having an armature of relatively low resistance, with a plurality of receiving elements of relatively small size and each having an armature of relatively high resistance, a circuit connecting said transmitter and receivers the size and resistance of said receiving elements relatively to the size and resistance 01: said sending element being such as to prevent a receiving element when in a wrong position from reacting upon the others, means for normally retaining said sending element in a desired plurality of angular positions, automatic means for temporarily increasing the operating current for said elements at the instant when said sending element is moved from one into another position, and a device for indicating said instances of signaling by said 1ncrease of operating current.

In testimony whereof I have hereunto set my signature in presence of two subscribing witnesses.

ERNST GEORG MISSBACH.

Witnesses:

WM. A. Corm'rmnn, H. ALFRED JANKE. 

